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Commit fad70972 authored by Johan Hedberg's avatar Johan Hedberg Committed by Marcel Holtmann
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Bluetooth: btusb: Use wait_on_bit_timeout() for BTUSB_BOOTING 



The wait_on_bit_timeout() is a simpler and race-free way of waiting for
a bit to be cleared than the current code in btusb.c. This patch updates
the code to use the helper function (its btusb copy - to be later
updated to use a global one).

Signed-off-by: default avatarJohan Hedberg <johan.hedberg@intel.com>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent a087a98e

drivers/bluetooth/btusb.c

+19 −25
Original line number Diff line number Diff line
@@ -1822,8 +1822,10 @@ static int btusb_recv_event_intel(struct hci_dev *hdev, struct sk_buff *skb) 
		 */

		if (skb->len == 9 && hdr->evt == 0xff && hdr->plen == 0x07 &&

		    skb->data[2] == 0x02) {

			if (test_and_clear_bit(BTUSB_BOOTING, &data->flags))

				wake_up_interruptible(&hdev->req_wait_q);

			if (test_and_clear_bit(BTUSB_BOOTING, &data->flags)) {

				smp_mb__after_atomic();

				wake_up_bit(&data->flags, BTUSB_BOOTING);

			}

		}

	}
@@ -2236,34 +2238,26 @@ static int btusb_setup_intel_new(struct hci_dev *hdev) 


	/* The bootloader will not indicate when the device is ready. This

	 * is done by the operational firmware sending bootup notification.

	 *

	 * Booting into operational firmware should not take longer than

	 * 1 second. However if that happens, then just fail the setup

	 * since something went wrong.

	 */

	if (test_bit(BTUSB_BOOTING, &data->flags)) {

		DECLARE_WAITQUEUE(wait, current);

		signed long timeout;



	BT_INFO("%s: Waiting for device to boot", hdev->name);



		add_wait_queue(&hdev->req_wait_q, &wait);

		set_current_state(TASK_INTERRUPTIBLE);



		/* Booting into operational firmware should not take

		 * longer than 1 second. However if that happens, then

		 * just fail the setup since something went wrong.

		 */

		timeout = schedule_timeout(msecs_to_jiffies(1000));



		remove_wait_queue(&hdev->req_wait_q, &wait);

	err = btusb_wait_on_bit_timeout(&data->flags, BTUSB_BOOTING,

					msecs_to_jiffies(1000),

					TASK_INTERRUPTIBLE);



		if (signal_pending(current)) {

	if (err == 1) {

		BT_ERR("%s: Device boot interrupted", hdev->name);

		return -EINTR;

	}



		if (!timeout) {

	if (err) {

		BT_ERR("%s: Device boot timeout", hdev->name);

		return -ETIMEDOUT;

	}

	}



	rettime = ktime_get();

	delta = ktime_sub(rettime, calltime);